Base for a desk set



FIG. 1 is a front elevational view of a base for a desk set showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a left-side elevational view;

FIG. 4 is a right-side elevational view;

FIG. 5 is a top plan view; and

FIG. 6 is a bottom plan view. 

The ornamental design for a base for a desk set, as shown. 